TY - JOUR
T1 - A novel application of nylon membranes for tributyltin determination in complex environmental samples by fluorescence spectroscopy and multivariate calibration
AU - Bravo, Manuel A.
AU - Escandar, Graciela M.
AU - Olivieri, Alejandro C.
AU - Bardin, Emmanuelle
AU - Aguilar, Luis F.
AU - Quiroz, Waldo
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/11/15
Y1 - 2015/11/15
N2 - The widely distributed pollutant tributyltin (TBT) was analyzed in different environmental samples (waters and sediments) combining preconcentration on a nylon membrane, excitation-emission fluorescence matrices directly measured over the membrane and second-order multivariate calibration. The latter was implemented using unfolded partial least-squares with residual bilinearization (U-PLS/RBL), a flexible algorithm achieving second-order advantage, even under severe spectral overlapping among sample components. Matrix-specific calibrations were required to overcome matrix effects, resulting in good analytical performance. TBT was determined in the concentration ranges 0.043-1.42ng Sn mL-1 in water and 24-400μg Sn kg-1 in sediments, with adequate detection limits in the range 0.03-0.15ng Sn mL-1.
AB - The widely distributed pollutant tributyltin (TBT) was analyzed in different environmental samples (waters and sediments) combining preconcentration on a nylon membrane, excitation-emission fluorescence matrices directly measured over the membrane and second-order multivariate calibration. The latter was implemented using unfolded partial least-squares with residual bilinearization (U-PLS/RBL), a flexible algorithm achieving second-order advantage, even under severe spectral overlapping among sample components. Matrix-specific calibrations were required to overcome matrix effects, resulting in good analytical performance. TBT was determined in the concentration ranges 0.043-1.42ng Sn mL-1 in water and 24-400μg Sn kg-1 in sediments, with adequate detection limits in the range 0.03-0.15ng Sn mL-1.
KW - Fluorescence spectroscopy
KW - Multivariate calibration
KW - Nylon membrane
KW - Tributyltin
UR - http://www.scopus.com/inward/record.url?scp=84942082548&partnerID=8YFLogxK
U2 - 10.1016/j.chemolab.2015.09.005
DO - 10.1016/j.chemolab.2015.09.005
M3 - Article
AN - SCOPUS:84942082548
SN - 0169-7439
VL - 148
SP - 77
EP - 84
JO - Chemometrics and Intelligent Laboratory Systems
JF - Chemometrics and Intelligent Laboratory Systems
ER -